Earnings Per Share (EPS) And Dividends (Basic And Diluted Earnings Per Share Computation) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		1 Months Ended		2 Months Ended	3 Months Ended		6 Months Ended
		May 31, 2022	Mar. 31, 2022	Feb. 28, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Stock Repurchase Program, Authorized Amount									$ 500
Accelerated Share Repurchases, Settlement (Payment) or Receipt					$ 250		$ 250
Accelerated Share Repurchase percentage of initial shares received			80.00%
Payments for Repurchase of Common Stock				$ 250	0		$ 500	$ 0
Treasury Stock, Shares, Acquired		600	3,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount							3,000
Net Income	[1]				$ 131	$ (177)	$ 129	$ 471
Weighted Average Common Shares Outstanding, Basic (shares)					497,000	504,000	499,000	504,000
Effect of Stock Based Compensation Awards, Basic (shares)					0	0	0	0
Total Shares, Basic (shares)					497,000	504,000	499,000	504,000
Net Income, Basic (dollars per share)					$ 0.26	$ (0.35)	$ 0.26	$ 0.94
Weighted Average Common Shares Outstanding, Diluted (shares)					497,000	504,000	499,000	504,000
Effect of Stock Based Compensation Awards, Diluted (shares)					3,000	0	3,000	3,000
Total Shares, Diluted (shares)					500,000	504,000	502,000	507,000
Net Income, Diluted (dollars per share)					$ 0.26	$ (0.35)	$ 0.26	$ 0.93

[1] Includes a $373 million after-tax impairment of the ISO NE asset grouping at PSEG Power in the three and six months ended June 30, 2021. See Note 4. Early Plant Retirements/Asset Dispositions and Impairments for additional information. Also includes net after-tax losses of $74 million and $206 million for the three months ended June 30, 2022 and 2021, respectively, and $682 million and $240 million for the six months ended June 30, 2022 and 2021, respectively, related to the impacts of non-trading commodity mark-to-market activity, which consist of the financial impact from positions with future delivery dates.